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Petroleum system analysis of the Hunton Group in West Edmond field, Oklahoma

American Association of Petroleum Geologists Bulletin

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DOI: 10.1306/​12031212075

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Abstract

West Edmond field, located in central Oklahoma, is one of the largest oil accumulations in the Silurian–Devonian Hunton Group in this part of the Anadarko Basin. Production from all stratigraphic units in the field exceeds 170 million barrels of oil (MMBO) and 400 billion cubic feet of gas (BCFG), of which approximately 60 MMBO and 100 BCFG have been produced from the Hunton Group. Oil and gas are stratigraphically trapped to the east against the Nemaha uplift, to the north by a regional wedge-out of Hunton strata, and by intraformational diagenetic traps. Hunton Group reservoirs are the Bois d'Arc and Frisco Limestones, with lesser production from the Chimneyhill subgroup, Haragan Shale, and Henryhouse Formation. Hunton Group cores from three wells that were examined petrographically indicate that complex diagenetic relations influence permeability and reservoir quality. Greatest porosity and permeability are associated with secondary dissolution in packstones and grainstones, forming hydrocarbon reservoirs. The overlying Devonian–Mississippian Woodford Shale is the major petroleum source rock for the Hunton Group in the field, based on one-dimensional and four-dimensional petroleum system models that were calibrated to well temperature and Woodford Shale vitrinite reflectance data. The source rock is marginally mature to mature for oil generation in the area of the West Edmond field, and migration of Woodford oil and gas from deeper parts of the basin also contributed to hydrocarbon accumulation.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Petroleum system analysis of the Hunton Group in West Edmond field, Oklahoma
Series title:
American Association of Petroleum Geologists Bulletin
DOI:
10.1306/​12031212075
Volume
97
Issue:
7
Year Published:
2013
Language:
English
Publisher:
AAPG Bulletin
Contributing office(s):
Energy Resources Program
Description:
17 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
1163
Last page:
1179
Country:
United States
State:
Oklahoma
Other Geospatial:
West Edmond Field